package com.bwie.config;

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.concurrent.TimeUnit;

/**
 * description:
 *
 * @Author youhongwei
 * @Create 2025/6/17 13:53
 * @Version 1.0
 */
@Component
public class GoldConfig implements GlobalFilter {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        String url = request.getURI().getPath();
        if(url.contains("login")||url.contains("sendCode") || url.contains("registerUser")){
            System.out.println("白名单：" + url);
            return chain.filter(exchange);
        }


        String token = request.getHeaders().getFirst("token");
        if(token == null){
            System.out.println("token为空：" + url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        Claims body = Jwts.parser().setSigningKey("123456").parseClaimsJws(token).getBody();
        Integer userId = body.get("userId", Integer.class);

        String key = "token-" + userId;
        String redisToken = stringRedisTemplate.opsForValue().get(key);
        if (redisToken == null) {
            System.out.println("token已过期：" + url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        if (!redisToken.equals(token)) {
            System.out.println("token错误:" + url);
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }

        stringRedisTemplate.expire(key,30, TimeUnit.MICROSECONDS);

        return chain.filter(exchange);
    }
}
